1、  Can you tell me _________?

2、  —Have you ever known Tom before?

3、  He _________ China for many years.

4、  When she knocked at the door, my mother _________ some washing.

5、  They _________ so proud of their school.

6、  The doctor _________ Robert carefully as soon as he was taken to the hospital.

7、  —Someone is knocking at the door. Who may it be?

8、  —The light in the office is still on.

9、  Now the air in our hometown is _________ than it was before.

10、  —Excuse me. Do you have a table for two?

11、  Where’s Lily? We are all here _________ her.

12、  Do you know the man _________ is sitting over there?

13、  I’m looking for a babysitter (保姆). She must be neither too old _________ too young.

14、  —What is _________ most useful invention in the 20th century?

15、  About _________ students in our class can describe that place in English.